Assassino senza volto (1968)

A woman is chased onto the ramparts of a castle by a gun-toting figure. She stumbles and falls to her death. Barbara, the mentally unbalanced owner of the castle, is the main suspect. However, there is no proof against her and the murders continued. But not everything is quite as it seems. The film is set in the Balsorano Castle and is shot in expressionistic black-and-white.